How would you handle the situation

We are supposed to be seeing my husband's family for Easter. But last I saw via social media that they were at a friend's house drinking with at least 15 other people.

I told my husband that upset me because they already have a large bubble and now they just make it even larger right before we will see them.

We spoke to his mom about our concerns about covid and that we were upset that had that exposure right before seeing our 2 month old.

She informed us they have been exposed to those friends for months now. Which they failed to inform us about when we've visited with them. My mother inlaw also babysits their 3 young old once a week so know I don't know how I feel about her seeing the baby.

I don't know how to approach the situation but at this point I feel deceived. I thought we all had an understanding we were all being as careful as possible so we could see each and feel safe doing so.